feat: expose boss via nginx base path

scripts/server_status.sh

@@ -5,6 +5,12 @@ port="${PORT:-43210}"
 data_dir="${BOSS_DATA_DIR:-.boss-data}"
 pid_file="${BOSS_PID_FILE:-$data_dir/server.pid}"
 log_file="${BOSS_LOG_FILE:-$data_dir/server.log}"
+base_path="${BOSS_BASE_PATH:-}"
+if [[ -n "$base_path" && "$base_path" != /* ]]; then
+  base_path="/$base_path"
+fi
+base_path="${base_path%/}"
+health_url="http://127.0.0.1:${port}${base_path}/api/health"
 
 if [[ -f "$pid_file" ]]; then
   pid="$(cat "$pid_file")"
@@ -18,7 +24,7 @@ else
 fi
 
 echo "---"
-curl -fsS "http://127.0.0.1:${port}/api/health" || true
+curl -fsS "$health_url" || true
 echo
 echo "---"
 tail -n 40 "$log_file" 2>/dev/null || true